Дисертації з теми "MPEG TRANSPORT STREAM"
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1
Shilarnav, Shashi R. "Transcoding transport stream mpeg2." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5068.
Повний текст джерелаАнотація:
Thesis (M.S.)--University of Missouri-Columbia, 2007.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on November 5, 2007) Includes bibliographical references.
2
Pajuelo, Castro Diego Arturo, and Laura Czichowsky Christian Alberto Di. "Un método de esteganografía para vídeos MPEG-4 High Profile que utilizan codificación CAVLC y empaquetamiento en Transport Stream." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2014. http://hdl.handle.net/10757/322269.
Повний текст джерелаАнотація:
El presente proyecto de tesis propone el desarrollo de un método de esteganografía de información aplicado al Transport Stream (TS) de la señal de televisión digital abierta ISDB-Tb, con el fin de mejorar la eficiencia del estándar en el uso del canal de transmisión y proteger información confidencial sin afectar la calidad perceptual de la imagen y el vídeo. Para ello, el trabajo se centra en el estudio de la televisión digital e implementación de un aplicativo fuera de línea para la inserción, extracción y análisis de información introducida por la técnica de esteganografía. Esta última, se basa en un algoritmo que explota las propiedades del propio estándar, alterando de forma controlada los coeficientes cuantizados ICT, y características empíricas observadas durante las pruebas de simulación. Con el propósito de validar el método seleccionado, el producto final es sometido a pruebas objetivas y subjetivas de calidad perceptual sobre tres contextos característicos del movimiento escénico en televisión: vídeo estático, medianamente variable y altamente variable. Las pruebas objetivas se realizan mediante el cálculo del valor PSNR y las subjetivas empleando el método de análisis SDG. En ambos casos, se varía la cantidad de información introducida durante las pruebas de simulación. Los resultados obtenidos demuestran que el modelo desarrollado supera en calidad perceptual a trabajos anteriormente realizados y afirma que es factible introducir información en la televisión digital de señal abierta ISDB-Tb. Finalmente, se concluye también sobre la importancia de incluir pruebas de análisis subjetivo en los trabajos de investigación afines y del especial cuidado que se debe tener ante la presencia de video estático, en el cual ligeros cambios pueden afectar severamente la percepción visual del espectador.Tesis
3
Macek, Libor. "Program pro analýzu transportního toku DVB-T." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220275.
Повний текст джерелаАнотація:
This thesis deals with development and implementation of program which enables DVB transport stream service information analysis. Theoretical part is focused on MPEG2 source coding of video signal and multiplexing into DVB transport stream. Practical part deals with program’s individual software modules implementation, which are used for data reading, their processing and presentation in form of service information. The program enables analysis of service information from live terrestrial television broadcasting DVB-T by PC card TechniSat AirStar 2 usage.
4
Simanaitis, Vytautas. "Vaizdo duomenų srauto apsaugos metodas, pagrįstas MPEG-2 transporto srauto daliniu šifravimu." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2012~D_20131104_105907-11536.
Повний текст джерелаАнотація:
Video srauto šifravimas yra pagrindinis intelektinės nuosavybės užtikrinimo metodas šiuolaikinėse skaitmeninių teisių valdymo sistemose (DRM). Egzistuojantys šifravimo metodai užtikrina labai aukštą apsaugos lygį, bet tuo pat metu reikalauja labai didelių skaičiavimo resursų ir yra sunkiai pritaikomi ribotų skaičiavimo resursų mobiliems vartotojų įrenginiams. Šiame straipsnyje pristatomas dalinis MPEG-2 transporto srauto šifravimo metodas, kuris yra tinkamas tokiems ribotų resursų terminaliniams vartotojų įrenginiams. Siūlomo metodo eksperimentinio įvertinimo rezultatai rodo, kad šifravimo ir dešifravimo laikai, lyginant su standartiniu pilnu šifravimu, yra sumažinami apie 7 kartus, todėl šis metodas yra tinkamas ribotų skaičiavimo resursų dešifravimo įrenginiams.Video stream encryption is the main method for the protection of intellectual property in modern digital rights management systems (DRM). Existing encryption methods ensure very high protection level of encrypted content, but at the same time are very resources demanding, making them hardly suitable for low processing power mobile end-user devices. This paper presents partial MPEG-2 transport stream encryption method, which is suitable for such low power user terminals. The experimental evaluation of proposed method show that encryption and decryption times, comparing with standard full encryption, are reduced about 7 times, making proposed method a good choice for low processing power decryption devices.
5
To, Kam Hung, and Erna Mehmedagic. "Design of Static Demultiplexing for Digital-TV." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9493.
Повний текст джерелаАнотація:
All digital-TV receivers that are existent on the market today include some sort of a multiplexer which filters the data, the sound and the picture from the digital stream. These de-multiplexers are rather complex and general. The purpose of this Master Thesis is to develop a de-multiplexer which would solely filter one specific type of information out of the data stream, in our case the name of the network.
The main task of this project contains a close study of MPEG2 and the transport streams in order to find a solution and create a static de-multiplexer. Another part of this project is to choose an adequate method for the control and data communication. We will study the bus protocols I2C and SPI.
Finally we will construct the entire circuit after having chosen the Development Environment, DE and considered all the different circuit designs suitable for our task as well as the working at a low production cost, which is of course an important factor and challenge. The first part of construction will be made in Very High Speed Integrated Circuit Hardware Description Language, VHDL, code and once the program is tested and working we will implement it and create the circuit. We will run a test of the final circuit test by filtering a near satellite signal and the get the name of the aimed network.
6
Irani, Ramin. "Error Detection for DMB Video Streams." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5086.
Повний текст джерелаАнотація:
The purpose of this thesis is to detect errors in Digital Multimedia Broadcasting (DMB) transport stream. DMB uses the MPEG-4 standard for encapsulating Packetized Elementary Stream (PES), and uses the MPEG-2 standard for assembling them in the form of transport stream packets. Recently many research works have been carried out about video stream error detection. They mostly do this by focusing on some decoding parameters related to frame. Processing complexity can be a disadvantage for the proposed methods. In this thesis, we investigated syntax error occurrences due to corruption in the header of the video transport stream. The main focus of the study is the video streams that cannot be decoded. The proposed model is implemented by filtering video and audio packets in order to find the errors. The filters investigate some sources that can affect the video stream playback. The output from this method determines the type, location and duration of the errors. The simplicity of the structure is one of advantages of this model. It can be implemented by three simple filters for detecting errors and a “calculation unit” for calculating the duration of an error. Fast processing is another benefit of the proposed model.
7
Řezníček, Ivo. "Automatické ukládání digitálního satelitního vysílání." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2007. http://www.nusl.cz/ntk/nusl-236869.
Повний текст джерелаАнотація:
This work aims at the creation of a~system of massive recording of multimedia data, especially speech data in various languages. The first issue is to find out high quality data source, the second is to build the system for managing and storing received data in the digital form. A digital satellite transmission is chosen as a signal source (DVB-S system). Main system features include recording of multiple streams in parallel, support of multiple cards, retrieving and storing of additional information (from Internet) and scheduling of recordings. The system will provide massive amounts of data for training of a language identification system.
8
Oliveira, Rodrigo Ribeiro de. "Metodologia de reconfiguração de hardware utilizando o sinal de TV Digital." Universidade Federal do Amazonas, 2015. http://tede.ufam.edu.br/handle/tede/4141.
Повний текст джерелаАнотація:
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This PhD thesis presents a novel hardware reconfiguration methodology, which uses the digital TV broadcast signal for reconfiguring hardware modules in digital TV receivers. The proposed methodology allows hardware cores to be signaled, during the transport stream generation step, transmitted and then reassembled. At the receiver, the recovered cores are then used to reconfigure reprogrammable field programmable gate array (FPGA) devices, which are integrated into each receiver unit. Besides, content signaling allows receivers to choose between FPGA cores synthesized for different manufacturers, which enables receivers to select broadcast hardware cores related to the employed FPGA models. The results of the performed experiments, which were carried out during the development of this work, consist in a proof of concept and show the technical feasibility of this methodology, regarding reconfiguration of pre-synthesized hardware cores through the digital TV environment. Receiver manufacturers could benefit from this methodology for developing reconfigurable architectures, which would allow the incorporation of technological advances into receiver hardware and provide better control regarding product life cycle. As a result, future revisions of DTV standards could occur without the need for device replacement.
Esta tese de doutorado apresenta uma metodologia de reconfiguração de hardware, que utiliza o sinal da emissora de TV digital como base para atualizar módulos de receptores de TV digital. A metodologia proposta permite que núcleos de hardware sejam sinalizados, durante a geração do fluxo de transporte, transmitidos e posteriormente remontados. Desse modo, os núcleos recebidos são usados na reconfiguração de dispositivos baseados em lógica reprogramável (field programable gate array - FPGA), que estão integrados ao hardware de cada unidade receptora. Além disso, a sinalização de conteúdo permite a distinção entre núcleos sintetizados para FPGAs de diferentes fabricantes, o que habilita receptores de TV digital a selecionar somente núcleos de hardware relativos aos modelos de FPGA utilizados. Os resultados obtidos com os experimentos realizados, durante o desenvolvimento deste trabalho, consistem em uma prova de conceito e demonstram a viabilidade técnica do uso desta metodologia de transmissão e reconfiguração, para núcleos pré-sintetizados de hardware enviados em um ambiente de televisão digital. Fabricantes de receptores poderiam utilizar os benefícios desta metodologia para o desenvolvimento de arquiteturas reconfiguráveis, o que permitiria a incorporação de avanços tecnológicos às funções de hardware do receptor e um maior controle do ciclo de vida de produto. Como resultado, futuras revisões de normas de TV Digital não resultariam em troca de equipamento.
9
Kobza, Jaromír. "Měření přijímače pro pozemní digitální televizi DVB-T." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218626.
Повний текст джерелаАнотація:
This thesis is focused on a receiver for digital television broadcasting set-top box, mainly on its features, parameters and measurement. The important point of this work is the possibility to analyze and visualize the parallel transport stream in the same time and the solution of this problem. The principle of tuner and its measuring is deeply discussed. The text is supported with oscilloscope screenshots in particular parts of decoding stream. The set-top box is modified for laboratory measurement purpose and the transport stream output is added. An example laboratory exercise was created as a part of this work.
10
Swärd, Rikard. "HTTP Live Streaming : En studie av strömmande videoprotokoll." Thesis, Mittuniversitetet, Avdelningen för informations- och kommunikationssystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-22254.
Повний текст джерелаАнотація:
Användningen av strömmande video ökar snabbt just nu. Ett populärt konceptär adaptive bitrate streaming som går ut på att en video kodas i flera olikabithastigheter. Dessa videor tas sedan och delas upp i små filer och görstillgänglig via internet. När du vill spela upp en sådan video laddar du först hemen fil som beskriver vart filerna finns och i vilka bithastigheter de är kodade i.Mediaspelaren kan där efter börja ladda hem filerna och spela upp dom. Om defysiska förutsättningarna, som exempelvis nedladdningshastighet eller CPUbelastning,ändras under uppspelningen kan mediaspelaren enkelt byta kvalitépå videon genom att börja ladda filer av en annan bithastighet och slippa attvideon laggar. Denna rapport tar därför en närmare titt på fyra tekniker inomadaptive bitrate streaming. De som undersöks är HTTP Live Streaming,Dynamic Adaptive Streaming over HTTP, HTTP Dynamic Streaming ochSmooth Streaming med avseende på vilka protokoll som dom använder.Rapporten undersöker även hur Apple och FFmpeg har implementerat HTTPLive streaming med avseende på hur mycket data som behövs läsas i en filinnan videon kan börja spelas upp. Rapporten visar att det inte är så storaskillnader mellan de fyra teknikerna. Dock sticker Dynamic AdaptiveStreaming over HTTP ut lite genom att vara helt oberoende av vilket ljud ellervideoprotokoll som används. Rapporten visar också på en brist i specificeringenav HTTP Live Streaming då det inte är specificerat att första komplettabildrutan i videoströmmen bör ligga i början av filen. I Apples implementationbehövs upp till 30 kB data läsas innan uppspelning kan påbörjas medan iFFmpegs implementation är det ca 600 byte.The use of streaming video is growing rapidly at the moment. A popular conceptis adaptive bitrate streaming, which is when a video gets encoded in severaldifferent bit rates. These videos are then split into small files and made availablevia the internet. When you want to play such a video, you first download afile that describes where the files are located and in what bitrates they are encodedin. The media player then begin downloading the files and play them. Ifthe physical conditions, such as the download speed or CPU load, changes duringplayback, the media player can easily change the quality of the video bystarting to downloading files of a different bit rate and avoid that the video lags.This report will take a closer look at four techniques in adaptive bitrate streaming.They examined techniques are HTTP Live Streaming, Dynamic AdaptiveStreaming over HTTP, HTTP Dynamic Streaming and Smooth Streaming andwhich protocols they use. The report also examines how Apple and FFmpeg hasimplemented HTTP Live Streaming with respect to how much data is needed toread a file before the video can begin to be played. The report shows that thereare no large differences between the four techniques. However, Dynamic AdaptiveStreaming over HTTP stood out a bit by being completely independent ofany audio or video protocols. The report also shows a shortcoming in the specificationof HTTP Live Streaming as it is not specified that the first completeframe of the video stream should be at the beginning of the file. In Apple's implementationits needed to read up to 30 KB of data before playback can bestarted while in FFmpeg's implementation its about 600 bytes.
11
Han, Taeseop. "Performance improvement schemes for the transport of MPEG video streams over ATM networks." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9743.
Повний текст джерелаАнотація:
In this thesis, the use of three different schemes are studied to overcome the loss of information when transferring MPEG video sequences through ATM networks. In the first scheme, the prioritization algorithm assigns different priorities to the video stream based on the different types of video frames. In the second scheme, the use of dummy cells to replace lost ATM cells is investigated in the ATM adaptation layer. For this second scheme, different patterns to be used for the dummy cells are investigated. In the third scheme, the data size of slices and the number of slices are controlled based on the different types of video frames and the order in a group of pictures. The experimental results show the effectiveness of these schemes to overcome the loss of information when transferring packetized video streams. Statistics of the signal to noise ratio (SNR) for different cell loss ratios (CLR) in each case are presented. Statistics gathered from the three types of schemes can be applied in several ways for network design and operation.
12
Chai, Zechu. "Embedded Design and Software Module Implementation in Multiple MPEG-2 Transport Streams Multiplexer." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480555292616335.
Повний текст джерела
13
Hirayama, Roberto Mitsuake. "Framework para testes e avaliação de sincronismo para aplicações de TV digital móvel." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-19092006-172310/.
Повний текст джерелаАнотація:
No transporte de vídeo e áudio para aplicações de TV digital com recepção em terminais móveis podem ser utilizadas redes de distribuição de conteúdo baseadas em pacotes. Essas redes tornam o transporte dos sinais mais flexível. Entretanto, podem adicionar atrasos e variações de atraso, prejudicando o sincronismo dos fluxos de informação e, conseqüentemente, a apresentação das mídias. Nesta dissertação foi proposto um framework para avaliação e testes de sincronismo, desenvolvido para estudar a influência das perturbações causadas por redes de dados ou por remultiplexações no sincronismo de programas MPEG2. O framework possibilita o controle dos parâmetros de QoS da rede de distribuição utilizada para transmitir pacotes de um fluxo de transporte (MPEG2 Transport Stream) e permite avaliar a influência desses parâmetros no sincronismo do fluxo. Adicionalmente, foram implementados mecanismos de ressincronização do fluxo de transporte no framework, de forma a minimizar os efeitos dessas perturbações na rede. Verificou-se que os métodos implementados reduzem os efeitos de variações de atraso da rede e ressincronizam o fluxo de transporte transmitido, de forma que a variação de atraso nas amostras da referência de tempo do fluxo (Program Clock Reference . PCR) volta aos níveis anteriores (sem aplicação de variação de atraso na rede).Content distribution packet networks can be used in video and audio transport for TV applications with reception in mobile terminals. These networks make signal transport more flexible. Nevertheless, they may add delay and jitter, damaging the synchronism of the information streams and, consequently, the media presentation. In this dissertation, a framework was proposed for synchronism test and evaluation. It was developed to study the influence of disturbances caused by data networks or remultiplexations in the synchronism of MPEG2 programs. The framework enables the control of QoS parameters of the distribution network used to transmit packets from a MPEG2 transport stream and allows the evaluation of the influence of these parameters in the synchronism of the streams. Furthermore, transport stream resynchronization mechanisms were implemented in the framework, minimizing the effects of these disturbances in the network. It was observed that the methods implemented reduce the effects of jitter in the network and resynchronize the transport stream transmitted, in a way that the jitter in the time reference samples (Program Clock Reference . PCR) of the stream returns to previous levels (without applying jitter in the network).
14
Kaller, Ondřej. "Analýza přenosu a měření signálu digitální televize DVB-S/S2." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218625.
Повний текст джерелаАнотація:
This master’s theses consists of theoretical introduction which includes basic search of referenced literature about digital television systems and picture quality classification. The results of signal character measurement of selected TV channels from satellites ASTRA 1E (DVB-S) and ASTRA 1L (DVB-S2) are provided. The energy budget calculation of downlink and results of 24-hour TS error rate measurement is included as well. The video quality by DVQL metric for each particular program of CS link stream was measured during full 24 hours.
15
Liu, Yaw-jye, and 劉耀傑. "MPEG-II Transport Stream Analyzer for Digital Video Applications." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/27690723539943675479.
Повний текст джерелаАнотація:
碩士大同工學院
資訊工程學系
84
This thesis is intended to develop an MPEG-II transport stream analyzer. A piece of software program is developed. This program runs on a PC environment to test and analyze MPEG-II transport streams. The results from programexecution will produce information concerning the number of programs in astream,the utilization of each type of packets, and the records of all PCR,PTS and DTS. It can also trace packets step by step, showing the importantfields of the packet.
16
Sun, Ming-Jyh, and 孫銘志. "Error Concealment for MPEG-2 Transport Stream in Satellite Communication Environment." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/05154587615882238621.
Повний текст джерелаАнотація:
碩士國立清華大學
電機工程學系
85
MPEG-2是一個受廣泛應用的視訊編碼標準，諸如視訊會議、數位廣播、高 畫質數位電視等，因此它在數位通訊裡伴演著一個重要的角色。在衛星通 訊上，由於大氣的情況變化莫測，傳輸的MPEG-2碼串會由於天候的影響， 產生了隨機或是聚集的錯誤。而錯誤對MPEG-2碼串的傷害力很大。因此， 本篇論文提供一些方法去對抗錯誤的產生。我們藉由錯誤更正碼去組合一 個錯誤更正的控制系統，來抵抗錯誤的發生。如果錯誤率太高無法由保護 碼所解決，本篇論文提出隱蔽錯誤的方法補救錯誤所造成的視訊品質破壞 。結果顯示，藉由錯誤更正的控制系統與隱蔽錯誤的方法，在一般氣候的 錯誤率下皆能保護良好，對於錯誤所造成的視訊黑塊也能恢復到可接受的 品質。本篇論文除了對MPEG-2單層編碼作模擬實驗，亦對空間解析度延伸 編碼、信號雜訊比延伸編碼作探討。 MPEG-2 is an international video coding standard for broadapplications such as video conferencing, digital broadcasting,and HDTV. It plays an important role in digital communication.For satellite communication, due to varying atmosphericcondition and rain attenuation, random or bursty errors may occurin the MPEG-2 transport stream. However, the MPEG-2 bitstream isvery vulnerable to errors. Hence we propose some means to combaterrors. The FEC system is implemented to protect the bitstreamand error concealment techniques are used to compensate the lostregions of a picture due to the errors which can not be correctedby the FEC system. The error concealment schemes of two-layersystems such as spatial scalable systems and SNR scalable systems are proposed. It is shown that the error concealment schemes giveoverall visual quality acceptable even under severe transmissionerror environments.
17
Lin, Shin-Yun, and 林炘昀. "Implementation of an MPEG-II Transport Stream Generator for Digital TV Testing." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/13817007918496241699.
Повний текст джерелаАнотація:
碩士大同工學院
資訊工程學系
85
Digital TV has become the focus of the next generation entertainment andinformation service in the broadcast environment. Development of a testing tool is key to the digit TV product development. This thesis focuses on the development of MPEG-II transport stream generator that can be used to testthe digital TV decoding system. This generator is PC-based and is capable ofanalyzing the MPEG-II transport stream in retrieving program and also to verifythe stream before testing is conducted. Futhermore, the generator is capable ofstreaming MPEG data stored in a video server with correct timing. The developmentwork focuses on two aspects. First, the architecture of the PC-based stream generator is defined so the device driver can be devised;secondly,the MPEG streamanalyzer, developed previously is refined to provide necessary information for stream analysis. In order to enhance the testing capability of the tool, a jitterssimulation algorithm is developed such that the stream generator can deliver anMPEG transport stream to test the decoder''s capability in handling the MPEG packetdelay- variations. The development work has been realized with testing results shown.This paper also discusses the usefulness of the testing tool and also gives the future development.
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PANCHAL, ANUJ. "DYNAMIC TROUBLESHOOTING OF SPECIFIC ETR -290 ALARMS IN A MPEG TRANSPORT STREAM." Thesis, 2015. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14367.
Повний текст джерелаАнотація:
ABSTRACT
The current scenario of Transport stream Monitoring and Analyzing is such that we are doing
the analysis of the Transport Stream at the output end i.e. the Streams are analyzed at the
receiver end and then the Troubleshooting is done by manually doing the required change and
therefore is not dynamic.
In this project the work has been done to analyze the output Transport stream just after the
multiplexer output, and make changes to the transport stream after analyzing the stream for a
specific ETR 290, Priority 1 alarm . All this is done without manual interception.
For the real-time environment , the generated stream after Satellite Transmission are received
back via a Ku,C band antenna and then are analyzed..
In this project the real time environment is simulated in the Multiplexing code itself .The
Analyzer monitors the Multiplexed stream for a specific ETR-290 alarm and will make
necessary changes in the repetition frequency of the that specific PID packet.
The specific ETR-290 alarm we have taken here is PAT_error.
The entire process takes place within the same Block wherein we don’t have to Increase or
Decrease the Frequency of reception of a PAT packet by manually inserting the time frame.
Here the Analyzer itself measure the PAT packet frequency and itself makes the adjustment
whether to increase or decrease the frequency of that PAT packet by looping back to the
multiplexer which generate PAT Packet..
19
PANCHAL, ANUJ. "DYNAMIC TROUBLESHOOTING OF SPECIFIC ETR-290 ALARMS IN A MPEG TRANSPORT STREAM." Thesis, 2011. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19700.
Повний текст джерелаАнотація:
The current scenario of Transport stream Monitoring and Analyzing is such that we are doing
the analysis of the Transport Stream at the output end i.e. the Streams are analyzed at the
receiver end and then the Troubleshooting is done by manually doing the required change and
therefore is not dynamic.
In this project the work has been done to analyze the output Transport stream just after the
multiplexer output, and make changes to the transport stream after analyzing the stream for a
specific ETR 290, Priority 1 alarm . All this is done without manual interception.
For the real-time environment , the generated stream after Satellite Transmission are received
back via a Ku,C band antenna and then are analyzed..
In this project the real time environment is simulated in the Multiplexing code itself .The
Analyzer monitors the Multiplexed stream for a specific ETR-290 alarm and will make
necessary changes in the repetition frequency of the that specific PID packet.
The specific ETR-290 alarm we have taken here is PAT_error.
The entire process takes place within the same Block wherein we don’t have to Increase or
Decrease the Frequency of reception of a PAT packet by manually inserting the time frame.
Here the Analyzer itself measure the PAT packet frequency and itself makes the adjustment
whether to increase or decrease the frequency of that PAT packet by looping back to the
multiplexer which generate PAT Packet..
20
Fang, Chih-Chi, and 方志吉. "An Algorithm for MPEG-2 Transport stream Multiplexing in Digital Video Broadcasting Systems." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/46776419536696786143.
Повний текст джерелаАнотація:
碩士大同工學院
資訊工程學系
84
The thesis is dedicated to the study of an algorithm for MPEG-2 transport stream multiplexing in digital video broadcasting systems, which isa branch of network traffic improvement. The MPEG-2 transport stream characterizations for digital video broadcasting systems are presented. In the algorithm part I, we show that the channels can be loadedbalance. And in the part II, we show that we can use the delay buffer toprevent the channel overloading from dividing the transport stream peaks. Furthermore, a new delay stream evaluation criterion is proposed. Thehigh volume, low sensitive is popular to be delayed. Experimental results show that the new algorithm for transport stream multiplexing are potential for use.
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Wu, Liang-Tan, and 吳兩田. "THE DESIGN AND SIMULATION OF MPEG-II TRANSPORT STREAM TO ATM CELL CONVERTER." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/01342066849842443222.
Повний текст джерела
22
Chang, Chiung-Chao, and 張炯照. "THE DESIGN AND SIMULATION OF ATM TO MPEG-2 TRANSPORT STREAM CONVERSION CIRCUIT." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/85673945297959612754.
Повний текст джерела
23
Wu, Tan-Gen, and 吳天健. "Media-Dependent FEC Design for Broadcasting MPEG2 Transport Stream." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/09212364378419703891.
Повний текст джерелаАнотація:
碩士國立臺灣大學
資訊工程學研究所
90
According to the progress of request for TV quality, the standard of digital TV has been present. Digital Video Broadcasting (DVB) Group defines DVB-S, which is a satellite transport digital TV standard. DVB-S uses MPEG-2 as compression and transport standards. Compressed video, audio, and other data information are inserted into fixed length MPEG-2 Transport Stream packets. Because the MPEG-2 video stream consists of I-Frames, P-Frames, and B-frames, which have different importance in the video stream, the packet lose of different frame may produce different decrease of video quality. We constructs a model that describes the relationship of packet lose and video quality, to discuss the difference between using general forward error correction and using weighted forward error correction. Moreover, we propose a method to find proper weighted values for maximizing video quality under the condition of limited extra bandwidth.
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Cai, Liang Norton. "Transport issues of real-time MPEG-2 video streams over IP network." Thesis, 1999. http://hdl.handle.net/2429/9174.
Повний текст джерелаАнотація:
Networked Multimedia is the point at which computer, telecommunication and
entertainment industries converge. With the deployment of gigabit and terabit routers in
fast data networks and the increasing performance of personal computers, there is
growing interest in providing network users with networked multimedia services.
Digital video and audio services will more often be delivered over intranets, the Internet
and other IP-related technologies. In contrast to research in the transport of MPEG-2
video over ATM, our project investigates the effects of network impairments at the IP
layer. We have developed a real routed IP testbed network with a Continuous Media File
Server, IP network performance measurement program, MPEG-2 video implementation
and quality measurement program.
One of the objectives of the project is to investigate the effects of network impairments,
specifically IP packet loss and jitter under moderately to heavily loaded network
conditions, on MPEG-2 video reconstruction. We studied MPEG-2 video stream
transport errors, error propagation, error sources and the severity of the error effects on
video quality. In consideration of the transport requirements of real-time MPEG-2 video,
we examined network impairments and related them to our classification of MPEG-2
errors. Based on the IP network performance metrics derived from the stressed testbed
network and the video quality obtained from the transported MPEG-2 streams, we
examined quantitatively the empirical relationships between IP network performance and MPEG-2 video quality. We observed the behavior that digital video presented when
transported in a lossy and bursty IP network.
By quantifying the effects of IP packet loss on MPEG-2 video quality, our study resulted
in four outcomes:
• Established the experimental system and collected quantitative data sets to investigate
the empirical relationships between MPEG-2 video quality and IP packet loss.
• When MPEG-2 video is transported in IP packets, slice loss rather than picture loss is
the dominant factor contributing to video artifacts within the range of fair quality
video.
• Spatial and temporal masking effects tend to reduce the visibility of artifacts
introduced by packet losses. Low motion / low spatial activity MPEG--2 video clips
are more susceptible to IP packet loss impairment than are high motion / high spatial
activity clips.
• PSNR, as a numerical comparison method, was found to linearly correlate with packet
loss in the high, medium, and low activity test streams.
The outcomes of the project provide useful information for variety of potential
applications. For example, the quantitative and statistical results and their implications
are very important in designing an effective and efficient Forward Error Correction.
25
Zilkie, Adam. "Performance analysis of two approaches to improving the quality of delivery of an MPEG2 transport stream over IP wide area networks." 2004. http://hdl.handle.net/1993/17941.
Повний текст джерела